<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
*{padding:0; margin:0}
#box1{width:400px; height:400px; margin:100px auto; position:relative;}
#rond{width:100%;height:100%; border:1px solid orange; border-radius:50%; position:relative; animation:rond 5s infinite ease-in-out}
#rond i{display:block; width:10px; height:10px; background:orange; border-radius:50%; position:absolute; top:50px; left:57px;}
#center{width:300px; height:300px; border-radius:50%; background:orange; position:absolute; left:50px; top:50px;}
@keyframes rond{
		0%{transform:rotate(0)}
		100%{transform:rotate(360deg)}
	}
</style>
</head>

<body>
<div id="box1">
	<div id="rond">
    <i></i>
    </div>
    <div id="center"></div> 
</div>
</body>
</html>
